"I realised then that a baby would pollute the planet - and that never having a child was the most environmentally friendly thing I could do."*

Had Toni Vernelli gone ahead with her pregnancy ten years ago, she would know at first hand what it is like to cradle her own baby, to have a pair of innocent eyes gazing up at her with unconditional love, to feel a little hand slipping into hers - and a voice calling her Mummy.

But the very thought makes her shudder with horror.

Because when Toni terminated her pregnancy, she did so in the firm belief she was helping to save the planet.

Incredibly, so determined was she that the terrible "mistake" of pregnancy should never happen again, that she begged the doctor who performed the abortion to sterilise her at the same time.

He refused, but Toni - who works for an environmental charity - "relentlessly hunted down a doctor who would perform the irreversible surgery.

Finally, eight years ago, Toni got her way.

At the age of 27 this young woman at the height of her reproductive years was sterilised to "protect the planet".

*The next logical step would be voluntary suicide. -- Frank Roman

Incredibly, instead of mourning the loss of a family that never was, her boyfriend (now husband) presented her with a congratulations card.

While some might think it strange to celebrate the reversal of nature and denial of motherhood, Toni relishes her decision with an almost religious zeal.

"Having children is selfish. It's all about maintaining your genetic line at the expense of the planet," says Toni, 35.

"Every person who is born uses more food, more water, more land, more fossil fuels, more trees and produces more rubbish, more pollution, more greenhouse gases, and adds to the problem of over-population."

While most parents view their children as the ultimate miracle of nature, Toni seems to see them as a sinister threat to the future.